Mechanical-draft installation



Oct 30, 1928.

HABER I zmcmxnicnn DRAFT INSTALLATION Filed Nov. 50, 1927 2-Sheets-Sheet 1 Oct. 30, 1925.

E. HABER MECHANICAL DRA F'I INSTALLATION Filed Nov. 30; 1927 ,2 Sheets-Sheqt Invehfor': Y

- Patented Oct. 30,- l 928.'

' utilizatio gases, wh ch is generally very little in the this ki UNITED -s-T TE-s 1 1,689,241 PATENT} Orr-lea.

- EUGEN HAIBER, or BERLIN-CHARLOTTENBURQ, GERMANY.

MECHANICAL-BRET. INsTALLA'r IoN.

Application filed November 30, 1927,-Seria1 in. 236,711, antlin German-y December 29; 1926.

This invention relates to a mechanical draft-installation 'with double blowers in which the chimney is directly. above .the flue gas-channel so that the flow of the flue-gases to the chimney is upwardly directed in straight direction of flow'without any defiec tion. T is arrangement makes possible, in order to conomize energies, the maximum of the ascending force of the mostly I W chimneys. .In, installations of sides the chimney and fitted withdilfusorlike scharge-tubes which tap directly into the himne I This invention has'for its. Object, to ensure, notwithstanding the pre'udicial effect of the .hot' flue-gas, uniform and proper working of, the blowers. This is obtained by fixing the two vane-wheels of'the double controlling the passage for the ower-jet and the other element controlling the natural draft, both elements being adjustable simul 'taneously and the one being independent of the other. I An embodiment of'the invention islillus trated, by way of example, in the accompanying drawing, lIl'WhlCh I Fig. 1 is a verticalsectiomshowing a section draft-installation. with double blower.

Fig. 2 is'a similar section showing a modi- -fied construction of the draft-installation.

Figs. 3- and 4' are sectional views, similar to Fi s. 1 and 2' respectively, the regulating flaps ingshown' in other, positions.

Fig. 5 is'a longitudinal section on en:

largedfscalefs'howing a chimney with double 5 re ulating flaps. a n the. form of construction shown in Fig. 1 the dischargetube for the flue-gases,

or the chimney 1, 1s subdivided by a central,

vertical partition '2." Oneither side-of the chimney 1 a.casin-g of a blower is-fixed'the one opposite the other, the blower 3 con- I necting the aperture. 5 of the chimneywith the other aperture on the same side r dethe-blowersare arranged on the gieldably connected by Garden-joints 18, or

ingly.

analogously during the service through the aperture-Ti in the other side-wall into the blower casing 4' and return through an upper aperture 8 inthe same side-wall into the chimney,- the direct ascending of the flue-' gases in the chimney j being prevented by butting ofi' flaps 9 to be operated fromithe outer side, and known per se. .When the blowers are stopped the flaps 9 are'opened in order to ensure a natural chimney-draft, free from disturbances. y Y In the blower-casing 3a vane-Wheel/lis keyed on ashort shaft 11, thetwo bearings 1 2' for thisshaft being on the outer .side of the casing .50 that they do not come into touch with the fiue gases. In accurate axial alignment with theshort shaft 11, a short shaft 14 journalled. in bearings 13 on the outer side of the blower-casing 4, projects into this casing. On the short shaft 13 inca'slng 4 a vane-wheel 16 is mounted, said short shaft 13 being coupled with the short shaft 11 by means ofan elastic connection, consisting preferably-ofa transverse rod 17,

Y Hand 13 and passing freely through a bore 19 of the partition 2. "f y The-two vane-wheels 10, 16 are.-looselymounted on theirshafts. By the-provision of this yieldable connectiondnstead of a continuous shaft, the axle 1 7 has to withstand only' the driving torque and. need not be. specially resistant to withstand warping due .to high temperature. 1 All the alterations 9 due t'o-the action of, the strong heat-of the flue-gases'remain without influence on the transmission of the revolving motion from the short-shaft 13 to' the'short shaft 11. The double blower is driven as shown by -a dia '9 rectly coup-led electromotor 205, which is connected to the short shaft'13 through the Y "intermediary of an elastic clutch' 21. When 1 this electromotor isdisengaged' ordoes not exist, the blowers might be driven-from any 'wisource of power by'means of a belt-pulley 22. When, for relieving the blower, the natural draft of the chin'imey hasto' be, utilized only v partly, the'flaps 9 have to beopened aecord- In this case exists however thedanger that the blower overcomes by i ts# strong draft the natural ascending-force in the chimney whereby the flue-gasesare again drawn downward, .so'that a i similar means, with the two short shafts continuous cir eulation is produced by the power-'- posed oftwo parts is submituted deinand of the blower; is increased in an. una desirable manner, the draft-effect itself being nevertheless decreased at the same time. Tojavoid this backward drawing of the'suction-efiect, a 'regulating'flafp, comor each ofthe two shutting-oil 'fla' s9, 'the' parts 23, 24 of these r lating aps being each mounted indepen ently of the dth'er on a separate adjusting axle. Theflap 23 is rigid on its axle 25 and designed'to regulate the free cross-section oft-he passa for the corresponding blower-jet. .The a 24 is keyed on a parallel axle 26 and a apt-ed to be adjusted independentl of the axle 25. The free cross-sections of t e chimney-halves and of the apertures 6 and 8 respectively and thereby the gas-quantities can- ,be actually mutually regulated so that the blowers do;

not. cause backward sucking of flue-gases from the chimney-section's above the aper tures and 7 respectively.

.According to the prevailing. conditions the flapelements-23, 24 may be adjusted to different ositions. The flap elements 23, 24; might or instance'be brought bothinto the. positions indicated in dash-lines in Fig. 2, the passage for the blower-jet being 'com-' letely liberated and the naturalascending orce of the gases being completely interrupted. For throttling the blower-jet the flap element 23 may be brought into an intermediate position, as shown in Fig. 3, the flap-element 24 remaining either in the.

position for shutting off the chimney or in such a position that itliberates the passagepartly. By means of-such regulating flaps,

composed of two elements, the free cross sections 'of therpassages can be regulated and relieving of the blowers can be carried through up to those limits in which no sucking back of flue-gases by the blower-draft from the chimney occurs.

Special adjusting of the blowers, necessary in the construction of older types is no longer necessary.

7 disturbance by the natural draft in the chimney. 3

In order'that the ad ustingof the two flap-elements may be, carried. out more rapidly, the one flap-element may be, as

\ shown in Fig; 5, rigid on its pivot-axle and the other flap element may-be connected to (If a sleeve enclosing said pivot-axle.

In Fig. 5 the flap-element 25 is rigid with its adjustin axle 27 and it has an inwardly projecting ateral arm 28, in the end of which the' ivot-axle 9 is rotatably mounted on which t efiap-element 26 is fixed.

In order that both flap-elements may be adjusted at the same time the flap-element 25 carries #a rotatable'nut 30, in'which a. screw spindle 31 is g'uided'which traverses further anut 32, rotatably mounted on the outersideof the casing 3. On the outer endof the screw-spindle 31 an adjusting- Wheel 33 .is fixed which may 'betmoved by hand or byendless rope or chain or' the.

like.- By rotating the adjusting wheel. 33 the screw-spindle31 is screwed in the nut 30, whereby the flap-element 25 is oscillated and makes the flap-element oscillate around its axle 27. The flapwelement 25 has anotherrotatable nut 34*and the flap-element 26 has a similar nut 35, a screw-spindle 36 projecting through these two nuts 34, 34 and carries, preferably :on the middle, an adjust ing wheel 37. The adjusting wheel 37 is rotated 'by means of a traction-element, vfor instance, an endless chain or cable, the freeside of which ex tendsto the outer side of. the chimney. By rotating this adjusting wheel 37 in the one .orother directiomthe two fla --elements 25, 26 are adjusted, the one wit regard to the other, whereby the free cross-sections oiflthe passages in the two' conduits are altered accordingly.

I claiin 1. A mechanical draft installation, comprising in combination with a chimney having in each of two opposite side walls an upper aperture and a lower aperture, a vertical central partition subdividingsaid chim'--- ney into two compartments, a blower casing on each of said opposite side walls-of said chimney covering the corresponding two apertures, a blower consisting of a. vane wheel in each casing for sucking the flue gases from the corresponding compartment into theblower casing and for returning said flue gases through'the corresponding upper aperture into the chimney, regulating flaps in each chimney compartment between said two apertures, a short shaft projecting from the outer side into each blower casing and carrying the corresponding vane wheel, means 'for driving one of said short shafts, a transverse rod extending from'one short shaft '10. the other short shaft through said partition, and an elastic clutch at each end of said transverse rod for elastically couplin said two short shafts the one Wltll. the ot er.

' 2. A mechanical draft installation, comprising in combination with a chimney having in each of two opposite side walls an upper aperture and a lower aperture, a ver f v ticalcentral partition subdividing ,saidchimney into two compartments and havin a horizontal bore, a blower casln on eac of said opposite sidewalls of sai chimney covering the corresponding two apertures, a blower -consist ng of avane wheel 1n each' casing-for sucking the flue gases from the corresponding compartment into the blower casing and "for returning said flue gases other short shaft throu h' said horizontal throu h the eorrespon u or a rture into time chimney, reguls iil ng aps each chimney compartment betweenv 'said two apertures, a short shaft projecting from the outer side into each blower casing and carrying the corresponding vane wheel, said two short shafts being accurately in alignment the one with the other, means for'driv- 1 ing one-0f said short shafts, a transverse rod eitending from one short shaft to the bore in said partition, an a Garden-joint at each end'of said transverse rod for elastical 1y coul laling' said two short shafts the one with t eother.-

3. In a mechanical draft installation ass ecified in claim'2 the regulating flapsin t e chimney consisting each of two elements one element oontrolling the passage for the blower jet and the other element controlling the natural draft in the chimney, and means for adjusting said two fla elements simultaneously and independent y the one of the 5 other.

In testimony whereof I a'i'n'x my signature.

'EUGEN HABER. 

